CSS3加载动画

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html

css

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html

css

body, html {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

body {
  background-color: #272727;
  box-shadow: inset 0px 0px 90px rgba(0, 0, 0, 0.5);
  margin: 0px;
  padding: 0px;
}

.demo {
  width: 100px;
  height: 102px;
  border-radius: 100%;
  position: absolute;
  top: 45%;
  left: calc(50% - 50px);
}

.circle {
  width: 100%;
  height: 100%;
  position: absolute;
}
.circle .inner {
  width: 100%;
  height: 100%;
  border-radius: 100%;
  border: 5px solid rgba(0, 255, 170, 0.7);
  border-right: none;
  border-top: none;
  backgroudn-clip: padding;
  box-shadow: inset 0px 0px 10px rgba(0, 255, 170, 0.15);
}

@-webkit-keyframes spin {
  from {
    -webkit-transform: rotate(0deg);
            transform: rotate(0deg);
  }
  to {
    -webkit-transform: rotate(360deg);
            transform: rotate(360deg);
  }
}

@keyframes spin {
  from {
    -webkit-transform: rotate(0deg);
            transform: rotate(0deg);
  }
  to {
    -webkit-transform: rotate(360deg);
            transform: rotate(360deg);
  }
}
.circle:nth-of-type(0) {
  -webkit-transform: rotate(0deg);
          transform: rotate(0deg);
}
.circle:nth-of-type(0) .inner {
  -webkit-animation: spin 2s infinite linear;
          animation: spin 2s infinite linear;
}

.circle:nth-of-type(1) {
  -webkit-transform: rotate(70deg);
          transform: rotate(70deg);
}
.circle:nth-of-type(1) .inner {
  -webkit-animation: spin 2s infinite linear;
          animation: spin 2s infinite linear;
}

.circle:nth-of-type(2) {
  -webkit-transform: rotate(140deg);
          transform: rotate(140deg);
}
.circle:nth-of-type(2) .inner {
  -webkit-animation: spin 2s infinite linear;
          animation: spin 2s infinite linear;
}

.demo {
  -webkit-animation: spin 5s infinite linear;
          animation: spin 5s infinite linear;
}

JavaScript

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